In the air-conditioning laboratory, when measuring the cooling capacity (or heating capacity) of the water side of the water machine, the inlet and outlet water temperature and water flow rate of the prototype are usually measured, and then the cooling capacity (or heating capacity) is calculated. The water flow here is basically measured with an electromagnetic flow meter.

Pressure transmitter (Pressure Transmitter) is a device that converts pressure into pneumatic signal or electric signal for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4-20mADC, etc.) to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.

What problems occur when you use pressure transmitters​? How do you solve with these problems? Here we introduce several common problems and the solutions to you.

The selection of pressure and differential pressure transmitters is mainly based on the measured medium, temperature environment, accuracy level, installation and maintenance costs, etc. After determining the manufacturer and model of the transmitter used, determine the variable according to the use requirements. range of the transmitter.

Electromagnetic flowmeter​ is a kind of variable area flowmeter. The working principle of electromagnetic flowmeter is that in a vertical cone tube that expands from bottom to top, the gravity of the circular cross-section float is borne by hydrodynamic force, and the float can move in the cone.

The English name of flowmeter is flowmeter, which is defined by the national science and technology terminology Approval Committee as an instrument indicating the measured flow and / or the total amount of fluid within the selected time interval.

Coriolis mass flowmeter (hereinafter referred to as CMF) is a direct mass flow instrument based on the principle of Coriolis force proportional to the mass flow when the fluid flows in the vibrating tube.

There are many kinds of flow measurement methods and instruments, and there are also many classification methods.

Positive displacement flowmeter, also known as constant displacement flowmeter, referred to as PD flowmeter, is one of the most accurate flow instruments.

Usually, in order to maintain the normal operation of an orifice flowmeter, the water pump needs additional power to overcome the pressure loss of the orifice.